25189940 has 48 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 9789312.

The previous prime is 25189939. The next prime is 25189973. The reversal of 25189940 is 4998152.

It is a junction number, because it is equal to n+sod(n) for n = 25189894 and 25189903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168986 + ... + 169134.

It is an arithmetic number, because the mean of its divisors is an integer number (1134000).

Almost surely, 2^25189940 is an apocalyptic number.

25189940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25189940 is an abundant number, since it is smaller than the sum of its proper divisors (29242060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25189940 is a wasteful number, since it uses less digits than its factorization.

25189940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 25189940 is about 5018.9580591991. The cubic root of 25189940 is about 293.1404235515.

The spelling of 25189940 in words is "twenty-five million, one hundred eighty-nine thousand, nine hundred forty".